They do still have BNB which means that they are not giving up that one and the yare doing a good job with that, nobody wanted them to stop BNB apparently. BUSD is not a must in this market and as long as we have other alternatives it will be fine.
https://paxos.com/2022/08/23/how-paxos-works-with-paypal-to-build-innovative-crypto-products/
BNB is traded on some exchanges but the main trading volumes are still in stablecoins, X/USDT is the most popular trading pair.